. >> msnbc's pete williams in washington. many thanks. >> you bet. >> new reaction from the white house as the flags fly at half staff to remember the victims. ] this is steve. he loves risk. but whether he's climbing everest, scuba diving the great barrier reef with sharks, or jumping into the market, he goes with people he trusts, which is why he trades with a company that doesn't nickel and dime him with hidden fees. so he can worry about other things, like what the market is doing and being ready, no matter what happens, which isn't rocket science. it's just common sense, from td ameritrade. a regular guy with an irregular heartbeat. the usual, bob? not today. [ male announcer ] bob has afib: atrial fibrillation not caused by a heart valve problem, a condition that puts him at greater risk for a stroke. [ gps ] turn left. i don't think so. [ male announcer ] for years, bob took warfarin, and made a monthly trip to the clinic to get his blood tested. but not anymore. bob's doctor recommended a different option: once-a-day